chore(ci): auto assign issues (#28873)

To make it easy for the team to quickly triage issues, we'd like to
automatically assign issues to team members at random. This PR use
https://github.com/marketplace/actions/auto-assign-issue to assign 1
member of the `framework` GitHub team to be the person to triage.

Author: liamdebeasi

.github/workflows/assign-issues.yml

@@ -0,0 +1,19 @@
+name: Assign issues to triage
+
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  auto-assign:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - name: 'Auto-assign issue'
+        uses: pozil/auto-assign-issue@edee9537367a8fbc625d27f9e10aa8bad47b8723 # v1.13.0
+        with:
+          repo-token: ${{ secrets.IONITRON_TOKEN }}
+          teams: framework
+          numOfAssignee: 1
+          allowSelfAssign: false